I've only tried the GM Genius 120 esc in stock settings ( 0 deg timing ) and that was indeed about the same as the speed you'll get from the citrix. Throtthle and braking on the Citrix might feel a little different towards your own ESC but its a very good way to get some training in.
Gear hard! Due to the 0 timing you have massive amounts of torque and the motor has nearly no fading issues at all during the run. On Heemstede we were allowed to run 3,5 max and on Andernach this was 4,0.. I guess there will be a fixed max ratio for the ETS race in Kastellaun again, I would recommend to just run that max gearing.
I hope this is the info you were looking for.